Rotary motor.



P. J. DARLINGTON.

ROTARY MOTOR.

APPLICATION FILED OCT. 28. 1914.

Patented Dec. 28, 19h?.

P. J. DARLINGTON.

RGTARY MOTOR.

APPLICATION HLED ocT. 28, 1914.

319116545., Patented Dec. 28, 1915.

3 SHEETS-SHEET 2.

3534/ K /9/7/6 E/ 5.5 56- /vO 54/2555'33 SO ES TlNTTElD STATES PATENT @FFTCFO PHILIP J. iDARLINGTON, `OIE HARTFORD, CONNECTTCUT.

nornnv Moron.

Specification of Letters Patent.

Patented Dec. 23, 1915.

Application filed October 28, 1914. Serial No. 862,029.

and cheapen the construction of motors f this class and at the same time increase their etliciency and render them longer lived and more easily repaired when the wearing parts become worn. j

The invention is applicable to water,

steam and'air driven motors, although it is illustrated and described'herein as embod- Y ied in an air driven machine.

Tn the accompanying drawings Figure 1 shows a central longitudinal section, through the exhaust port, of a motor con structed according to this invention. Fig.l

2 shows a central longitudinal section, throughthe admission port, at right angles to the section of Fig. 1. Fig. 3 is a transversel section on line 3-3 of Fig. 1, looking-forwardly. Fig. 4 is'a transverse section on line 4-4'of Fig.; 1 looking rearwardly. Fig. 5 is a face view of one of the cross-keys. Fig. 6 is an 'end velevation of the. cross-key projected from Fig. 5.

The motor shown has a cylinder 1, a front cylinder cover `2 and a rear cylinder cover 3 mountedconcentrically in an outer shell 4. A plug 5 closes the rear end of shelly 4 and has a screwed in pipe connector 7, in!

exhaust, respectively,'the motive fluidto and,

from the chamber to cause rotation of the shaft in a well known manner.

Heretoforev shells have had an internal flange at one end and an internal screw thread at the other end. The internal fiange was objectionable in the cost and waste of material to form it and in its interference with grinding the shell to exact inslde diameter after the' distortion due to hardening. The internal screw 4thread was objectionable because the-thickness of shellr must be increased an amount equal to the depth of the thread to retain equal strength.

This thickening of the wall prevented the use of solarge an inside diameter of shell or s o large, strong and powerful a motor in al given size of tube to be cleaned, which was often` a matter of great importance in motors for use in small diameter tubes. The screw thread was further very objectionable by reason of its change in diameter and distortion out of round in the process of hardening, rwhich caused leaks and could not be cheaply corrected by grinding.

The shell 4 of yy invention is of plain tubular construction, without flange or screw thread and may be cut from a length of tubing, of hard drawn bronze or seamless steel, withoutmachining. 1n my preferred construction, as shown, the contents of the shell may be inserted or removed `through either end. Either cylinder cover may be removed without disturbing the cylinder, which may be tightly forced into place. For any special purpose any one or more of the contained members may be permanently secured in theshell and others removable from whichever end is available.

, The front cross-key 14, seated in the front cross-slot 15 in the front cylinder cover 2, projects outwardly through the front aperture 16 in the shell 4. The thickness of the cross-key 14 corresponds with the width of the cross-slot 15 in the cylinder cover and the aperture 16 in the shell. The outer contour of the cross-key is partly cylindrical, in two steps 17 and 18 of different di ameters forming a shoulder 19 and coinciding with4 the outer and inner diameters, respectively, of the shell 4. 1When the parts are in their forwarder locked position as 4shown in Fig. 2, the surface 18 of the crosskey underlies a portion of the shell adj acentto the openingl, while the shoulder 19 vof the key abuts against the forward edge of the aperture 16. A similar rear cross-key 21 in a rear' cross-slot 22 formed in plug 5 projects outwardly through a rear aperture 23 in the shell 4 and is similarly locked in place.

The front and rear cross-keys are locked in place by a forward and rearward movement, respectively, of the front cylinder cover 2 and the plug 5 in the shell 4, and are held in such locked position by the pipe connector 7 ,'I which is screwed tightly against the rear face of rear cylinder cover- '3 and from which the forward pressure is transmitted through the cylinder 1 to the front cylinder cover 2.

To assemble the parts' in the shell, they are inserted, from either end, with the apertures of the shell coinciding each with its own cross-slot. The crosskeys are then dropped through the apertures in the shell,

into place in the .cross-slots and the pipe con- -l nector 7 screwed forward to force the parts into the locked positions shown on Fig. 2, in which positions they are retained by the reactive effect of the driving effort of the motor when held by the supply pipe. T o

disassemble the motor,\.the connector 7 is the direction of rotation of the motor shaft.

so that the parts will be held in place by the reactive effort of the motor.

Shell 4 is extended forwardly, beyond the motor, to better guide'and protect the at-V tached cleaning tool.

A feature of my invention is the means for rotatably'mounting the shaft 8 in antifriction bearings to receive the severe side loads incident to this type of motor and the end loads due to the weight of the revolving parts when used vertically. The forward portion' of the shaft 8 is supported by front rollers 24 carriedin a front plate 25 and forming a well known type of roller bearing. This roller bearing runs in a front bearing chamber 26 formed in frontcylinder cover 2 and open forwardly but closed at the rearA by an internal flange 27 forming a shoulder 28 and separating the bearing chamber from the piston chamber.

Shaftl 8 is preferably, as shown, of the same diameter at the center and at the for- Ward journal portion, but may be reduced in diameter for large motors.

Rollers 24 and plate 25 ,are held in place.

by a retaining sleeve 29 on -the shaft. The sleeve 29 is held in place by the hub 30 of a driven tool, which may be screwed on to a threaded extension 31 to a shoulder 32 on the shaft 8. The holding sleeve 29 is keyed to the shaft 8 by a shaft key 34 and has a radial socket or hole 35 which can be turned roller bearing which runs in a rear, externally tapered, casing 40 which is forced into a tapered bearing chamber 41 .in rear cylinder cover 3. Shaft 8 has a collar 42, preferably. integral, as shown, and an intermediate reduced portion 43v forming a shoulder 44 with the central slotted body of the shaft. Casing 40 has an internal flange 45, preferably integral as shown, intermediate its lengthand of slightly larger bore than the diameter of collar 42. Rear bearing balls 46 run upon conical faces 47 and 48 on the front face of collar 42 and the rear face of flange 45 respectively. A round hole 33 in the cylindrical wall of casing 40 is slightly larger than balls 46 and is located with its extreme forward edge slightly back of the center of balls 46 when in normal position, so as not to interrupt the bearing race or surface.

A space 49 between' shoulder 44 and collar 42 allows the casing to be moved forward on shaft 8 until balls 46 can be passed in through hole 33 and dropped to their normal posltion ,in casing 40, which may then be moved back into its normal position on shaft Vv8 and placed in bearing chamber 41. The'con'struction of the rear bearing,as

shown, combines roller bearings and ball bearings for the side and end loads.

A washer 62 in the bottom of chamber 41 receives the occasional rearward end thrust of shaft 8. W'asher 62 is held in place by the casing 40 which is held in place by thev overlying end face of the cylinder 1.

A feature of my invention isl the means for f covers more or fewer holes 50 as the stop A disk is rotated into 'different angular position and'regulates the area of openingV and amount of air admitted to the motor.

A feature of my invention is the means for adjusting the point or time of cut-0E ofI the air entering the pistons chamber to give incassa vadmission passage 53 and the radial admission passage 54 conduct the motive fluid to the valve pocket 55 formed in the front face of casing 40 by removing a segmental portion therefrom between the advance shoulder 56 and the following shoulder 57. The air supply to the space behind the piston 9 is cut off, from the far edge, when piston 9 passes advance shoulder 56. By setting casing Li0 in different angular positions this point of cut off may be adjusted for such time or angular position of the piston, during its revolution, as may be found to give best economy for any set of conditions of air pressure and load.

For abnormal conditions of low air pressure, the auxiliary admission passage 58 and auxiliary admission port 59 may be opened by removing the stop plug 60 which is normally seated in auxiliary admission passage 58 against an internal shoulder 61.

A feature of my invention is the means for lubricating the front roller bearing and keeping the rollers clear of dust and dirt. Exhaust port 13 communicates with a longitudinal exhaust passage 64C in cylinder l to an exhaust pocket 65 in the rear face of the front cylinder cover 2, which opens to atmosphere through an exhaust passage 66 formed in the outer circumference of front cylinder cover 2 and is closed on its outside by shell 4. An exhaust opening 67 communicates from the exhaust pocket 65 to the bearing chamber 26, behind the front roller bearing. llfhis is additional to the exhaust passage 66, while the oil charged exhaust air from the opening67 blows out through the clearance spaces between the rollers 24, keeping the roller bearing lubricated and clear of dust.

I claim as my invention 1. A rotary motor having a shell with a lock receiving opening, av plug with a lock receiving recess, movable longitudinally within the shell, a lock designed to be inserted through the openingin the shell into the recess in the plug when the parts are longitudinally out of normal operative relation and to be held in place by the shell and prevent rearward displacement of the plug when the parts are in normal relation, a motor body within said shell and a concentric hollow hose connecting member screwed through said plug against said motor body to hold said plug in normal relation to said shell.

2. ln a rotary motor, a motor body, a rotary shaft having a threaded extension for the attachment of a tool, rolling. members rotatably supporting said shaft in said body and a retaining member removably carried on said shaft between said extension and said rolling members to hold same in place, said retaining member being keyed to said shaft and having a radial socket for the insertion of a-bar.

3. A rotary'motor having a cylindrical shell, a motor cylinder within said shell, a rotary shaft, a holding member keyed to said shaft and having a radial socket, said shell having a radial opening registering with' said socket through which a holding bar may be introduced into said socket to hold said shaft from turning in said shell.

4f. A. rotary motor having a shaft with a threaded extension for the attachment of a tool, a bearing member and a holding memn ber surrounding said shaft and removable over said extension, a removable longitudinal key seated in said shaft and said holding member to prevent said shaft turning relative to said holding member, said holding member having a radial socket for the insertion of a holding bar.

5. A rotary motor having an eccentric piston chamber, a slotted shaft and a sliding piston dividing the piston chamber into an admission and an exhaust space, a plurality of rolling bearing elements supporting 1said shaft and an exhaust. passage from said exhaust space communicating to the spaces between said rolling elements to keep them lubricated and free from dust.

6. A rotary motor' of cylindrical form having a Cylinder and cover and a concentric shaft, a concentric bush adj ustably seated in a taper seat in said cover supporting said shaft, a longitudinal admission passage and a radial admission passage in said cover and a radial admission port in the end face of said bush communicating with said radial passage and adjustable, by rotating said bush, to communicate with a varying arc of an eccentric piston chamber in said cylinder.

ln testimony whereof l have signed my name to this specification in the )resence of two subscribing witnesses this 2 th day of Uctoberv, 1914. Y'

PHILlP J. DARLlNGTUN.

W'itnesses:

BERTHA Ar. Mona, Planer C. SMITH. 

